<template>
  <view v-if="goods_info.name" class="goods-detail-container">
    <!-- 图片区 -->
    <view class="img">
      <image :src="goods_info.picture" @click="preview()"></image>
    </view>
    <!-- 商品信息区域 -->
    <view class="goods-info-box">
      <!-- 商品价格 -->
      <view class="price">{{ '￥' + goods_info.price }}</view>
      <!-- 商品信息主体区 -->
      <view class="goods-info-body">
        <!-- 商品的名字 -->
        <view class="goods-name">{{ goods_info.name }}</view>
        <!-- 收藏 -->
        <view class="favi">
          <uni-icons type="star" size="18" color="gray"></uni-icons>
          <text>收藏</text>
        </view>
      </view>
      <!-- 运费 -->
      <view class="yf">快递：免运费</view>
    </view>
    <view class="goods-detail">
      <!-- 属性 -->
      <view class="attrs">
        <view class="detail" v-for="(item, i) in goods_info.details" :key="i">
          <view class="dt">{{ item.name }}</view>
          <view class="dd">{{ item.content }}</view>
        </view>
      </view>
      <!-- 详情图片 -->
      <image v-for="img in goods_info.detailimg" :src="img" :key="img" alt="" />
    </view>

    <!-- 商品导航组件区域 -->
    <view class="goods_nav">
      <uni-goods-nav :fill="true" :options="options" :buttonGroup="buttonGroup" @click="onClick"
        @buttonClick="buttonClick"></uni-goods-nav>
    </view>
  </view>
</template>

<script>
  import { mapState, mapMutations, mapGetters } from 'vuex'
  
  export default {
    computed: {
      ...mapState('m_cart', []),
      ...mapGetters('m_cart', ['total'])
    },
    watch: {
      total: {
        handler(newVal) {
          const findResult = this.options.find(x => x.text === '购物车')
            if (findResult) {
              findResult.info = newVal
              }
        },
        immediate: true
      }
    },
    data() {
      return {
        goods_info: {},
        //左侧按钮
        options: [{
          icon: 'shop',
          text: '店铺',
          backgroundColor: '#ff0000',
        }, {
          icon: 'cart',
          text: '购物车',
          info: 0
        }],
        buttonGroup: [{
            text: '加入购物车',
            backgroundColor: '#ff0000',
            color: '#fff'
          },
          {
            text: '立即购买',
            backgroundColor: '#ffa200',
            color: '#fff'
          }
        ]
      };
    },
    onLoad(options) {
      const goods_id = options.goods_id;
      this.getGoodsDetail(goods_id);
    },
    methods: {
      ...mapMutations('m_cart', ['addToCart']),
      async getGoodsDetail(goods_id) {
        const {
          data: res
        } = await uni.$http.get('/goods', {
          id: goods_id
        });
        if (res.meta.status != 200) return uni.$showMsg()
        this.goods_info = res.data
      },
      preview() {
        uni.previewImage({
          urls: this.goods_info.picture
        })
      },
	  onClick(e) {
		  if(e.content.text === '购物车') {
			  uni.switchTab({
			  	url:'/pages/cart/cart'
			  })
		  }
	  },
    buttonClick(e){
      if(e.content.text === '加入购物车') {
        // 组织商品的信息对象
        // { goods_id, goods_name, goods_price, goods_count, goods_small_logo, goods_state }
        const goods = {
          goods_id: this.goods_info.id,
          goods_name: this.goods_info.name,
          goods_price: this.goods_info.price,
          goods_count: 1,
          goods_small_logo: this.goods_info.picture,
          goods_state: true
        }
        //调用addToCart方法
        this.addToCart(goods)
      }
    }
    }
  };
</script>

<style lang="scss">
  .img {
    height: 700rpx;

    image {
      height: 100%;
      width: 100%;
    }
  }

  .goods-info-box {
    padding: 10px;
    padding-right: 0;

    .price {
      color: #C00000;
      font-size: 18px;
      margin: 10px 0;
    }

    .goods-info-body {
      display: flex;
      justify-content: space-between;

      .goods-name {
        font-size: 15px;
        margin-right: 15px;
      }

      .favi {
        width: 120px;
        font-size: 12px;
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        border-left: 1px solid #e8e8e8;
        color: gray;
      }
    }

    .yf {
      font-size: 12px;
      color: gray;
      margin: 10px 0;
    }
  }

  .goods-detail {
    padding: 10px;

    .attrs {
      display: flex;
      flex-wrap: wrap;
      margin-bottom: 10px;
      font-size: 13px;

      .detail {
        display: flex;
        margin-bottom: 5px;
        width: 100%;

        .dt {
          width: 60px;
          color: #999;
        }

        .dd {
          flex: 1;
          color: #666;
        }
      }
    }

    image {
      width: 100%;
      height: 350px;
      display: block;
    }
  }

  .goods_nav {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
  }
  
  .goods-detail-container {
    padding-bottom: 50px;
  }
</style>